High Availability High Performance How to sleep without the - - PowerPoint PPT Presentation

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High Availability High Performance How to sleep without the - - PowerPoint PPT Presentation

Jun 20, 2023 105 likes •560 views

High Availability High Performance How to sleep without the server-crash-fear Michael Schmid michael@amazeelabs.com @schnitzel High Availability no Single Point of Failure Redundancy High Performance Response times

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High Availability High Performance

How to sleep without the server-crash-fear

Michael Schmid michael@amazeelabs.com @schnitzel

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High Availability

  • no „Single Point of Failure“
  • Redundancy
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High Performance

  • Response times
  • Caching
  • HTML
  • Data (serialized)
  • Scalable
  • adding easy and fast more

servers

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Scalable & Redundancy Server System

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starting position

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Goal

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starting position

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Two Webserver

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Apache

  • APC
  • precompiled
  • keeps files in memory
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nginx

  • lightweight Webserver
  • Reverse Proxy
  • Loadbalander
  • can be faster
  • more knowledge needed
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Two Webserver

MySQL?

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starting position

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dedicated MySQL

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second Webserver

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How to Access?

?

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Loadbalancer

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Loadbalancer

  • passes through requests
  • „Man in the middle“
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Loadbalancer

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second Loadbalancer

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second Loadbalancer

files?

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NFS

NFS

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NFS

fallback?

NFS

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GlusterFS

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GlusterFS

  • Distributed Filesystem
  • multiple Server/Clients
  • auto-heal
  • split-brain
  • Not soo fast
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GlusterFS

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second GlusterFS

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MySQL

fallback?

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MySQL Master/Slave

  • Master
  • WRITE
  • Slave
  • READ
  • Hot Spare
  • Slave become Master
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MySQL

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MySQL

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Memcache

memcache?

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Memcache

  • Replaces “_chache“ tables
  • Key / Value Store
  • Fast
  • Memory only
  • own Server
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Memcache

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Memcache

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Varnish

Varnish Varnish

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Varnish

  • Reverse Proxy
  • Caches full HTML Pages
  • Hates Cookies/Sessions
  • No SSL
  • Drupal 6
  • Pressflow
  • Drupal 7 & 8
  • in Core
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ESI (Edge Side Includes)

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ttl=1h pass

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ESI

<esi:include src="http://www.osec.ch/userblock" />

  • Cache whole page, load only

small parts

  • Varnish / Squid / Nginx (SSI)
  • Drupal Module
  • blocks, panel panes, context

module

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Questions?

Michael Schmid michael@amazeelabs.com @schnitzel